I'm experiencing the same as Hamster - even if I click the lower left corner of the response I want to reply to.

Sporadically, more often not, it refuses to expand responses already read when I click the "+" button. The ole "sometimes" problem.

A week ago it all worked. Now, not. I've tapped, I've swiped - it's just not cooperating. Any ideas??

I cannot swear I'm logged in - I found the login screen last week, I know don't remember exactly how. On the DFW category screen, I believe it's the "pencil" button at the top of the screen? Tapping it highlights it and takes me to a blank screen with just the category of D/FW, which I'm in.

Good luck trying to find or follow threads though. I am very frustrated with trying to follow/read the threads. The boxes are too light to see which are indented under another and I get very frustrated trying to read or follow a topic on my i-phone.